style_formats.php not deletable/moveable

Hi there~

i wonder if anyone is able to help me here.
Like the title suggests, i am not able to overwrite or delete the “style_formats.php” inside the include folder. Well… its not just the file more like the whole folder.

I modified the style_formats a bit regarding the individual settings like adding 1 more style to the formats. That worked with no problems so far. But since my last tweak on it i am not able to overwrite, delete or move the file from the ftp. And i am not able to reset the premission on the file. All i could find out was that the groupe wich is set on the file, is not the one the other files have.

I dont know why it suddely happend. Has anyone a hint or idea how i can solve this problem? I wold realy appreciate any comments.

I apolegies for any grammer errors or passages that might be hard to understand.